For businesses running Windows 7 and planning to migrate to Windows 10 in the near future, there may be more to consider than just the migration itself. Microsoft, and many solution providers, contend that it's not wise to try to upgrade existing Windows 7 PCs to Windows 10, as many older PCs may not perform as well with the higher requirements of Windows 10. A hardware refresh, of course, will only add to the complexity of moving to Windows 10—especially if you are a larger business with many users. On paper, at least, the requirements for installing Windows 10 Pro are not onerous; among them are a processor with a clock speed of at least 1 GHz, at least 1 GB of RAM and up to 20 GB of free hard drive space.